<template>
  <div class="login-container">
    <div class="login-box">
      <!-- 登录图标 -->
      <div class="avatar-box">
        <img
          src="../assets/logo.png"
          alt=""
        >
      </div>
      <!-- 表单登录区域 -->
      <el-form
        :rules="loginFormRules"
        :model="loginForm"
        label-width="0px"
        class="login-form"
        ref="loginFormRef"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button
            type="primary"
            @click="login"
          >登录</el-button>
          <el-button
            type="info"
            @click="loginFormReset"
          >重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是登录表单的验证规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置登录表单
    loginFormReset () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登陆失败')
        this.$message.success('登录成功')
        // 1. 将登录成功之后的token，保存到客户端的 sessionStorage 中
        // 1.1 项目中处理登录之外的其他API接口，必须在登录成功之后才能访问
        // 1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
        window.sessionStorage.setItem('token',res.data.token)
        // 2.通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')

      })
    }
  }
}
</script>

<style lang="less" scoped>
.login-container {
  background-color: #2b4b6b;
  height: 100%;
}
.login-box {
  background-color: #fff;
  width: 450px;
  height: 300px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-radius: 3px;
  .avatar-box {
    width: 130px;
    height: 130px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid pink;
    border-radius: 50%;
    padding: 10px;
    background-color: skyblue;
    box-shadow: 0 0 10px red;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: red;
    }
  }
  .login-form {
    position: absolute;
    bottom: 0;
    padding: 20px;
    width: 100%;
    box-sizing: border-box;
    .btns {
      display: flex;
      justify-content: flex-end;
    }
  }
}
</style>>
